Hey everyone, We have a usb spectrometer device that we have finally got working in linux (we were provided linux only drivers). The device has a Silicon Instruments cp2101 serial-to-usb chip onboard, and we loaded the kernel module cp2101.c after taking the device apart to see what was on the inside. Using minicom we are able to set a baud rate and open up a terminal when pointing to the device /dev/ttyusb0 (I think). Anyway, I want to be able to talk to our cool device using python. I haven't been able to find many resources specifically in this area, but there are a few package that are vaguely mentioned, including fcntl and termios. But the web doesn't seem to have a lot of documentation on fcntl, particularly information thats from the past 8 years.
So my question is this - what is the easiest way to interface to this "serial" device? I don't imagine a straight read() and write() command to /dev/ttyusb0 is the most efficient (if it even works) especially since we would need to set a baud rate. My experience with terminal communication is pretty limited. Any advice that can be offered would be awesome. Thanks! PS: The device that we will be using python on will be an embedded ARM system. Currently we are testing using a linux laptop and cross compiling the kernel over to the embedded device. The device has Python 2.4, and does have both the termios and fcntl packages available. Python 2.4.2 (#1, Feb 20 2008, 11:07:36) [GCC 4.1.1] on linux2 uname -a: Linux gumstix 2.6.21gum #1 Wed Feb 20 02:53:01 EST 2008 armv5tel unknown Blaine Booher University of Cincinnati -- http://mail.python.org/mailman/listinfo/python-list
